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Posted by on Tuesday, September 13, 2011 at 6:28am.

A person travels by car from one city to another with different constant speeds between pairs of cities. She drives for 40.0 min at 85.0 km/h, 12.0 min at 95 km/h, and 35.0 min at 30.0 km/h, and spends 35.0 min eating lunch and buying gas. Determine the average speed for the trip?

  • physics - , Tuesday, September 13, 2011 at 7:06am

    Use the same method as this question's answer. The numbers are different.

    Add the non-driving time to the driving time and convert to hours. Then divide the total distance by that total time in hours.

  • physics - , Tuesday, September 13, 2011 at 7:29am

    210.9km/1.1083hrs=190.2914km/h ??????
    done it so many times am so confuse!!!

  • physics - , Tuesday, September 13, 2011 at 7:36am

    Why are you using 1.1083 hr for total time? You already computed 19.483 hr, which should have been 1.9483 hr.

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